His ____ look on his face suggested that he was ____ to hear the _____ news.
________ him before, I didn't recognize him.
As a teacher, I seldom give my students so difficult a problem ________ they can not work out.
None of us had expected the middle-aged engineer died ____ his design uncompleted.
______, Obama’s health care reform hasn’t been accepted by all the Americans yet.
Many of the creatures in the movie “Avatar” are not real, but much of __________ happens is attractive.